Z9NA-D6 Formal BIOS 3301 release
1. Update version 3.5.0.1005 option ROM of SCU and SATA.
2. Patch BIOS System Event Log record the error date.
3. Update code for WHQL test & UEFI Firmware Certification
test.
*BIOS 3301 will support WHQL, and BIOS is not able to downgrade
due to complete BIOS structure changed.
*If your BIOS version is 0503 or older: Go to BIOS-Utilities to
download and flash the BIOS to version 3107 firstly before
updating the BIOS.

BIOS 5204 for Z9NA-D6 released to public
1. Improve compatibility for High Point RocketRAID 2720/4320.
2. Fix the issue of system may show duplicated "Window Boot
Manager" after updating BIOS.
3. System prior use UEFI drivers when disabled CSM function.
4. Update RSTe to 3.7.0.1049(Legacy Option ROM and UEFI
driver)
5. Reset system after pressing F10 for saving BIOS changes.
6. Fix system may not able to detect PS/2 mouse somehow.
*If your BIOS version is 0503 or older: Go to BIOS-Utilities to
download and flash the BIOS to version 3107 firstly before
updating the BIOS.

BIOS 5402 for Z9NA-D6 released to public
1. Update ASUS logo.
2. Improve the system stability.
*If your BIOS version is 0503 or older: Go to BIOS-Utilities to
download and flash the BIOS to version 3107 firstly before
updating the BIOS.